Josephson rhymes with:
gustafson, olafson, olofson, adolphson, dethlefsen, detlefsen, ellefson, gustafson, gustafsson, olafson, olofson, rolfson, tellefsen, tollefsen, tollefson, wolfson
Josephson sounds like:
jacobsen, jacobson, jakobsen, jeppesen, jeppson, jepsen, jepson, jipson, jobson